气态玻色-爱因斯坦凝聚体中受激光辐照的旋子
Rotons in gaseous Bose-Einstein condensates irradiated by a laser.
作者信息
O'Dell D H J, Giovanazzi S, Kurizki G
机构信息
Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom.
出版信息
Phys Rev Lett. 2003 Mar 21;90(11):110402. doi: 10.1103/PhysRevLett.90.110402. Epub 2003 Mar 17.
Abstract
A gaseous Bose-Einstein condensate irradiated by a far off-resonance laser has long-range interatomic correlations caused by laser-induced dipole-dipole interactions. These correlations, which are tunable via the laser intensity and frequency, can produce a "roton" minimum in the excitation spectrum--behavior reminiscent of the strongly correlated superfluid liquid He II.
摘要
由远失谐激光照射的气态玻色-爱因斯坦凝聚体具有由激光诱导的偶极-偶极相互作用引起的长程原子间关联。这些关联可通过激光强度和频率进行调节，能在激发谱中产生一个“旋子”极小值——这种行为让人联想到强关联超流液态氦II。
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